How to send commands from pc to ADAM-4520

Hi ,

I working on a project to send data using VB to ADAM-4520 (RS-232 to RS-422/RS-485 isolated converter). So far I have checked on the internet and couldn't find help on how to do this. Would someone be kind enough and provide me some link to websites that you know might help me understand the basic of how I can talk to it from VB. Any help is really appreciated.

Thank you

What device are you trying to communicate with through the converter?

My project is for Dispensing chemicals

I will be communicating to:

SY3220-5L image below:



and to ITV2030-312BS3 with a image below:



So overall, I will be using VB to determine the amount of chemical to add accurately.

Hope this helps.

There must be another device in between. The ADAM-4520 is an RS-232 to 485 converter, but the 2 devices you listed require a 24V signal and an analog signal to control.

VB has a .COM model for serial communication. You need to reference that object model. It will depend on your version of VB. Once you've got a reference to the proper object model the handling of the serial port is relatively easy and there are tons of examples on the internet.

Good luck,

Yosi

The other components I have are:

CDUK16-200


Adam 4024


And I installed Adam-4500 Series Utility

This is all I have. If there's anything else you think I might need please let me know

OK. I just looked up the ITV2030-312BS3. In the manual it says that it communicates using CC-Link. (Here's a link to the manual)

https://www.smcpneumatics.com/pdfs_smc_instructional/CC-Link-E.pdf

My recommendation is that you should spend the $$$'s for an OPC server (KepWare?) that supports CC-Link and easily write your VB code to talk OPC.

Good Luck,

Yosi

I did some research on the coding aspect of it. This involved creating object and opening the communication channel, etc.

The link to the page is http://downloadt.advantech.com/ProductFile/Downloadfile3/GF-1HAUW/Using%20Basic%20Script%20in%20ADAMView%20to%20Open%20a%20COMport%20to%20Send%20ASCII%20Commands.pdf.

I understand most of the code however the part DIM CommandTag AS TAG, I don't get what TAG supports to be. Not sure if I need to import something into the code apart from the MSCommLib. Maybe you understand what they are trying to do here.


Also the OUTPUTS 0,MyComm.Input, when written in VB changes to OUTPUTS (0,MyComm.Input). So it's taking that as a subroutine. This means it's changing the original meaning. Would have an idea why this is line not recognized.

Thank you for the help in advance

The ADAM-4024 can be controlled using ADAM ASCII or Modbus/RTU protocols. I would recommend setting up the module to use Modbus and use a modbus driver otherwise you will have to write the code to send the ADAM ASCII commands to the serial port. Appendix G in the user manual gives the Modbus addresses to use. For example 40001 controls the value of channel 1

Another option that would be the fastest route would be to use AdvancedHMI. It has a ModbusRTU driver. Here are a few quick steps to get started:

- Download and extract AdvancedHMI
- Open the solution in Visual Studio
- Build the solution
- Open the MainForm
- Add the driver to the form, then set your com port, baud rate, etc.
- Add a BasicLabel to the form and set PLCAddressValue property to 40001
- Set PLCAddressKeypad property to 40001
- Run the application and click on the BasicLabel to enter a new value

Thank you Sir for that. I will have a look into this and try it out and see how it goes.

I just have two question, when you say click on the BasicLabel to enter a new value.
I will writing this value to the channel 1.
Sorry for asking, but it's just I'm new to this.
So using the method you described above I will be able to communicate to the Adam module but the value that I would be adding. How do I know what it will do? Is there a data book that tells what the value sent is doing.

I had a look at the Adam-4520 and Adam-4024 on the Advantech website (this is where it was ordered from), there's not mention that it supports Modbus/RTU protocol. However, other modules mention it is supported. I assume as you gave me info about advanced HMI that it will support both these ADAM modules. I'm I right to say this?

Thank You for the help in advance

Down load the manual from here:

http://downloadt.advantech.com/ProductFile/Downloadfile1/1-NQGUAT/ADAM-4000_manual_V20.pdf

First see page 2-7 on how to set the module for ModbusRTU

The 4024 module is an analog output module. If you use address 40001 for the BasicLabel, then the value you key in after clicking the BasicLabel would represent the voltage or current you want to put out of the module on channel 1

Thank you very much for the pdf document. It really helped me a lot in understanding how the module would link up.

I continued reading the document up to the coding part (24-27).
I started to code using the instruction using that.

I had a bit of problem with the code. So chr$(13), gave an error so I changed this to Convert.ToChar(13) to change that.
Buffer$ gives an error as "Type character ' $' does not match declared data type 'Double'. I researched this in the internet and found $ means it's a string type variable. So I understand that buffer$ needs to be declared. So to remove the buffer$ I declared it has Dim buffer$ = "". Now I don't know what it needs to assigned to. At the moment it's " ". Do you know the specific string it needs to be assigned to?

Plus, I added another error writing this line MSComm1.CommPort = 1, so what I did was to create an object as:
Dim MyComm As MSComm = CreateObject("MSCOMMLib.MSComm"). Than I replaced every MSComm with MYComm. Not sure if this is correct haven't tried it out. Just waiting for your help with buffer$ = ? .


If it’s not too much to ask, apart from the document that I listed before for coding, do you know of any other documents that may provide me with other examples. I have tried to research the internet but had no luck so far.

Thank you

Offered without comment because I didn't write it.

Let see if it lets me attach an XLS witha form